Merge pull request #1829 from akhoury/master

Group.join() callback made optional
possible fix for #1830
closes #1830
some tag hooks/filters
#1
small fix to router
Update heroku.rst

updated redis dependencies
Added openshift

if there are mistakes, thank you to correct them.
Added openshift second correction

if there are mistakes thank you to correct them.
Update openshift.rst
Update cloud.rst
Merge pull request #1835 from unixfox/master

Added openshift
Update guide openshift with redis
Update openshift.rst
Update openshift.rst
The last update commit of openshift guide
dont select hidden br
closes #1840
random console.log
small change to tag search